In one aspect, an eye shield for a respirator mask of the type having a face piece adapted to fit over the face of a user is provided. The eye shield includes a visor assembly including a visor surrounded by a frame, the visor assembly configured to be removably mounted in an opening in the face piece. One or more fastener elements are provided on the frame for removably securing the visor assembly to the face piece. The visor is formed of a transparent material which filters electromagnetic energy emissions at one or more preselected wavelengths. In certain embodiments, one or more head up display assemblies are attached to the visor assembly for projecting a human viewable image to the visor.